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Home > Products > Integrated Circuits (ICs) > Logic > FIFOs Memory

Renesas 72V221L15PFGI8

Name: 72V221L15PFGI8
Brand: Renesas
SKU: 72V221L15PFGI8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 72V221L15PFGI8

Manufacturer:: Renesas

Category:: FIFOs Memory

Package:: 32-LQFP

Datasheet:: 72V221L15PFGI8.pdf

Description:: IC FIFO SYNC 1KX9 10NS 32TQFP

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Product details

Overview

72V221L15PFGI8 from Integrated Device Technology (IDT) is a 3.3 V CMOS Synchronous FIFO memory with 1,024 × 9-bit depth, 10 ns read/write cycle time, dual-clock operation support, and programmable Almost-Empty/Almost-Full flags. It serves as a high-speed data buffer in interprocessor communication and local area network interfaces where deterministic latency and clock domain bridging are required.

For engineers reviewing the 72V221L15PFGI8 datasheet, 72V221L15PFGI8 pinout, 72V221L15PFGI8 application, or 72V221L15PFGI8 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts - all aligned to IDT's official specification DSC-4092/7 (March 2018).

Technical Context

The 72V221L15PFGI8 implements a zero fall-through time, dual-ported synchronous FIFO architecture with independent WCLK and RCLK domains. Its write path uses WEN1/WEN2/LD for configurable enable logic or flag offset loading, while the read path employs REN1/REN2 and OE for three-state output control.

It features two fixed status flags (EF, FF) synchronized to RCLK and WCLK respectively, plus two programmable flags (PAE, PAF) with default offsets of Empty+7 and Full−7. The device supports both single-clock (RCLK = WCLK) and asynchronous dual-clock modes, with tSKEW1 = 5 ns minimum clock edge separation for reliable flag updates.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Depth	1,024 × 9-bit words - provides precise buffering capacity for mid-size packet or frame storage without over-provisioning.
Cycle Time	15 ns - enables 66.7 MHz maximum clock frequency for high-throughput data streaming applications.
Supply Voltage	3.0 V to 3.6 V - compatible with modern 3.3 V logic systems and tolerant to 5 V inputs on control pins.
Flag Synchronization	EF/PAE tied to RCLK; FF/PAF tied to WCLK - ensures deterministic timing behavior across clock domains.
Programmable Offset Range	Configurable via 8-bit registers (default Empty+7 / Full−7) - allows fine-grained system-level flow control without hardware changes.
Operating Temperature	−40°C to +85°C - qualified for industrial environments including factory automation and telecom infrastructure.
Package	32-pin TQFP (PF suffix) - surface-mount footprint with 0.8 mm pitch, suitable for automated PCB assembly.

Pinout & Package

72V221L15PFGI8 is packaged in a 32-pin plastic Thin Quad FlatPack (TQFP), order code PF, with 0.8 mm lead pitch and JEDEC MO-220 standard dimensions. Pin numbering follows top-view orientation with index corner marked.

Pin/Terminal	Circuit Role	Design Meaning
RS	Asynchronous Reset	Active-low global reset that initializes pointers, flags, and output register; required before first write after power-up.
WCLK, RCLK	Write/Read Clock Inputs	Independent TTL-compatible clocks; rising-edge triggered; support synchronous or asynchronous operation.
WEN1, WEN2/LD	Write Enable / Flag Load Control	Configurable at reset: dual-write-enable mode (depth expansion) or flag offset programming mode (LD active low).
REN1, REN2	Read Enable Inputs	Both must be low to enable read; allows system-level gating or expansion logic integration.
OE	Output Enable	Active-low control of Q0–Q8 bus; places outputs in high-impedance state when deasserted.
D0–D8, Q0–Q8	9-bit Data Bus	Separate input and output ports eliminate bus contention; supports concurrent read/write in dual-clock mode.
EF, FF, PAE, PAF	Status Flags	Real-time FIFO status signals synchronized to respective clocks; enable precise buffer management in FPGA or ASIC controllers.
VCC, GND	Power Supply	Single 3.3 V supply with decoupling recommended per datasheet layout guidelines.

Key Features

Feature	Design Value
Dual-clock zero-latency architecture	Enables seamless bridging between unrelated clock domains (e.g., CPU ↔ peripheral bus) without metastability risk or added pipeline stages.
Programmable Almost-Empty/Full flags	Allows dynamic adjustment of buffer watermark thresholds via serial load sequence - eliminates need for external logic or firmware polling.
5 V-tolerant control inputs	Permits direct interfacing with legacy 5 V microcontrollers or FPGAs without level-shifting circuitry on RS, WEN1, REN1, etc.
Industrial temperature rating	Validated operation from −40°C to +85°C ensures reliability in harsh environments such as motor drives and base station equipment.
PLCC and TQFP package options	32-pin TQFP (PF) variant supports high-density PCB layouts; PLCC (J) option available for through-hole prototyping or legacy rework.

Applications

Interprocessor Communication	Network Interface Buffering
Use Scenario: Two microcontrollers exchange command/status packets across isolated voltage domains using separate clocks. IC Role / Device Role / Timing Role: 72V221L15PFGI8 acts as a clock-domain crossing FIFO, absorbing jitter and rate mismatches between processors. Use Value: Eliminates handshake logic and software synchronization overhead; guarantees lossless transfer at up to 66.7 MB/s (9-bit × 66.7 MHz).	Use Scenario: Ethernet MAC layer buffers incoming frames before DMA transfer to host memory. IC Role / Device Role / Timing Role: 72V221L15PFGI8 provides deterministic latency buffering between PHY clock domain (25 MHz) and system clock domain (100 MHz). Use Value: Prevents frame loss during burst traffic; programmable PAF/PAE flags trigger early DMA requests to avoid overflow or underflow.
Graphics Data Streaming	Industrial PLC I/O Expansion
Use Scenario: FPGA-based display controller streams pixel data to a parallel LCD interface running at different pixel clock frequency. IC Role / Device Role / Timing Role: 72V221L15PFGI8 serves as a video line buffer, decoupling rendering engine clock from display timing generator. Use Value: Enables smooth scrolling and frame-rate conversion; 1,024-word depth accommodates one full line of 1024-pixel RGB565 data.	Use Scenario: Modular PLC backplane routes sensor data from multiple I/O modules to central CPU using time-sliced access. IC Role / Device Role / Timing Role: 72V221L15PFGI8 buffers analog input samples from distributed ADC modules before batch upload. Use Value: Absorbs timing skew between modules; EF/FF flags coordinate slot arbitration without CPU intervention.

Interprocessor Communication

Network Interface Buffering

Use Scenario: Two microcontrollers exchange command/status packets across isolated voltage domains using separate clocks.

IC Role / Device Role / Timing Role: 72V221L15PFGI8 acts as a clock-domain crossing FIFO, absorbing jitter and rate mismatches between processors.

Use Value: Eliminates handshake logic and software synchronization overhead; guarantees lossless transfer at up to 66.7 MB/s (9-bit × 66.7 MHz).

Use Scenario: Ethernet MAC layer buffers incoming frames before DMA transfer to host memory.

IC Role / Device Role / Timing Role: 72V221L15PFGI8 provides deterministic latency buffering between PHY clock domain (25 MHz) and system clock domain (100 MHz).

Use Value: Prevents frame loss during burst traffic; programmable PAF/PAE flags trigger early DMA requests to avoid overflow or underflow.

Graphics Data Streaming

Industrial PLC I/O Expansion

Use Scenario: FPGA-based display controller streams pixel data to a parallel LCD interface running at different pixel clock frequency.

IC Role / Device Role / Timing Role: 72V221L15PFGI8 serves as a video line buffer, decoupling rendering engine clock from display timing generator.

Use Value: Enables smooth scrolling and frame-rate conversion; 1,024-word depth accommodates one full line of 1024-pixel RGB565 data.

Use Scenario: Modular PLC backplane routes sensor data from multiple I/O modules to central CPU using time-sliced access.

IC Role / Device Role / Timing Role: 72V221L15PFGI8 buffers analog input samples from distributed ADC modules before batch upload.

Use Value: Absorbs timing skew between modules; EF/FF flags coordinate slot arbitration without CPU intervention.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous FIFO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IDT72V221L15TFGI	TQFP-32 package, same electrical specs, but commercial temp range (0°C to +70°C)	Not rated for industrial environments; unsuitable for outdoor or factory-floor deployments	Select only for cost-sensitive commercial designs with controlled ambient conditions.
ON Semiconductor NB3N502DG	256 × 9-bit depth, 10 ns cycle time, LVDS-compatible, no programmable flags	Limited buffering capacity; lacks PAE/PAF for advanced flow control; requires external logic for depth expansion	Choose when lower density suffices and differential signaling is required; not drop-in compatible.

Compared with IDT72V221L15TFGI and NB3N502DG, the 72V221L15PFGI8 uniquely combines industrial temperature rating, 1,024-word depth, and user-programmable flags - making it optimal for embedded systems requiring robust, scalable buffering without redesign.

Availability

72V221L15PFGI8 is available at Aetrix Electronics and suitable for interprocessor communication, network interface buffering, graphics data streaming, and industrial PLC I/O expansion requiring stable component supply and long-term industrial qualification.

Supply support for 72V221L15PFGI8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions.

The IDT72V2xx family was designed specifically for high-speed, low-latency data buffering in mixed-clock-domain systems - targeting communications infrastructure, industrial automation, and embedded computing applications.

FAQ

What is the memory organization of the 72V221L15PFGI8?

The 72V221L15PFGI8 features a 1,024 × 9-bit synchronous FIFO memory array, meaning it stores 1,024 words of 9-bit data. This configuration supports byte-aligned transfers with parity or control bit inclusion, and is explicitly confirmed in IDT's DSC-4092/7 datasheet under the "FEATURES" section listing "1,024 x 9-bit organization IDT72V221".

Does the 72V221L15PFGI8 support dual-clock operation?

Yes, the 72V221L15PFGI8 fully supports dual-clock operation: WCLK controls writes and RCLK controls reads, and they may run asynchronously. The datasheet specifies tSKEW1 = 5 ns minimum skew between rising edges for reliable flag updates, and confirms "Read and Write clocks can be independent" in the FEATURES list.

What is the function of the WEN2/LD pin on the 72V221L15PFGI8?

The WEN2/LD pin on the 72V221L15PFGI8 is a dual-function terminal. At reset, its logic level configures the device: held LOW enables programmable flag offset loading; held HIGH enables second write enable mode for depth expansion. This behavior is defined in the PIN DESCRIPTIONS and SIGNAL DESCRIPTIONS sections of the datasheet.

What are the default values for the programmable Almost-Empty and Almost-Full flags on the 72V221L15PFGI8?

The 72V221L15PFGI8 defaults to Empty+7 for the Programmable Almost-Empty (PAE) flag and Full−7 for the Programmable Almost-Full (PAF) flag. These values are stored in the offset registers upon reset and are explicitly stated in the "FEATURES" and "SIGNAL DESCRIPTIONS" sections of the IDT datasheet DSC-4092/7.

Is the 72V221L15PFGI8 suitable for industrial temperature applications?

Yes, the 72V221L15PFGI8 is qualified for the industrial temperature range of −40°C to +85°C, as confirmed in the "RECOMMENDED OPERATING CONDITIONS" table and highlighted in the "DESCRIPTION" section of the official IDT datasheet DSC-4092/7.

72V221L15PFGI8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: 72V

Package/Case:: 32-LQFP

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Memory Size:: 9K (1K x 9)

Function:: Synchronous

Data Rate:: 66.7MHz

Access Time:: 10ns

Voltage - Supply:: 3 V ~ 3.6 V

Current - Supply (Max):: 20mA

Bus Directional:: Uni-Directional

Expansion Type:: Depth, Width

Programmable Flags Support:: Yes

Retransmit Capability:: No

FWFT Support:: No

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Supplier Device Package:: 32-TQFP (7x7)

72V221L15PFGI8 FAQ

1.How can I place an order for 72V221L15PFGI8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 72V221L15PFGI8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 72V221L15PFGI8 reliable?

The price and inventory of 72V221L15PFGI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72V221L15PFGI8 is usually 5 days.

3.What payment methods are accepted for 72V221L15PFGI8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 72V221L15PFGI8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 72V221L15PFGI8?

72V221L15PFGI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 72V221L15PFGI8 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 72V221L15PFGI8?

For technical support, including 72V221L15PFGI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72V221L15PFGI8 requirements.

6.How does Aetrix verify that 72V221L15PFGI8 is sourced from the original manufacturer or authorized distributors?

All 72V221L15PFGI8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 72V221L15PFGI8 meets industry standards.

7.What is the process for return or replacement of 72V221L15PFGI8?

All 72V221L15PFGI8 units undergo pre-shipment inspection (PSI). If there is an issue with 72V221L15PFGI8, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 72V221L15PFGI8 part is unused and in its original packaging.

Return procedure for 72V221L15PFGI8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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